ABB ACS1000 User Manual

07 ELECTRICAL INSTALLATION
3BHS213401 E01 REV H ACS1000 AIR-COOLED USER MANUAL 97/184
7.5.4 Bolted connections
7.5.4.1 Material requirements
Use stainless steel bolts and nuts with the appropriate steel grade and property class for the
connection (recommended: A2-70 [designation according to ISO 3506]).
Note: Nuts with bonded coating can be used as an alternative to uncoated stainless steel nuts.
7.5.4.2 Connection type
The following connection type is recommended when a cable lug (4 in Fig. 7-11) is connected to
a busbar:
- Spring washer (1 in Fig. 7-11) and flat washer (2 in Fig. 7-11) on each side of the busbar
(3 in Fig. 7-11).
Note: Other washers can be used, provided they maintain the required contact pressure.
Figure 7-11: Bolted busbar connections
- Use cable lugs suitable for M12 bolts.
7.5.4.3 Lubrication
- If stainless steel bolts and nuts are used, lubricate the thread and head contact surface of
the bolt using recommended pasts, eg, Molykote D paste.
Note: If a coated nut (eg, with bonded molybdenum-disulfide [MoS
2
] coating) is used, the
connection does not need to be lubricated.
7.5.4.4 Tightening torque
- Tighten bolted connections with bolts of sizes M10 and greater with the recommended
nominal torque for the bolt size used.
(1) Spring washer
(2) Flat washer
(3) Busbar
(4) Cable lug
1
2
3
4
2
1

ABB ACS1000 Specifications

General

Brand	ABB
Model	ACS1000
Category	Industrial Equipment
Language	English